Hello,

I have installed Xen 4.9-unstable with source on Ubuntu 15.10 and uses 4.2.0-42-generic kernel.

Before installing Xen, I used perf to check which events are supported.I found that hardware event are supported by it. Now, I want to use performance counters from virtual machine, so after installing Xen,I installed XenOprof which allows to access performance counter through virtual layer also.

When I executed the following command, I got the message that OProfile is in timer mode.

sudo opcontrol --start-daemon --event=GLOBAL_POWER_EVENTS --vmlinux=/home/dhbuch/vmlinux --xen=/home/dhbuch/xen-4.9-unstable

As per the documentation, timer mode is set automatically when hardware events are not supported by the kernel, but through perf it was tested that hardware events are supported.

Kindly help to come out of the timer mode so that performance counter values can be monitored.

Thank you,

Dhara Buch